'Port Huron to Detroit' is a terrain generated map of the Grand Trunk Western RR from Port Huron MI to Detroit MI .The route is approx.60 miles long. The map has 1000 baseboards, and covers 200 sq miles. There are no 'Tiger Lines' shown, but small signs, indicating the location of cities and towns, have been placed along the track so that conditions in those areas, (Multiple track, yards, roads ,waterways, etc.), can be accessed using USGS topo maps.